I'll look at your different ideas about the GUI and other graphics options.
If I can, I'll try to include the modifications within the patch of the demo.
In the game, there is a software both for setting the options and launching the different software (LGdN, Tools)
In the option, you can choose the resolution and some other features.
About the light of textures; it varies during the day, max at 12:00 AM, varying with the season too.
JMM